Bad service from MTN SA.

I’m am very disappointed with MTN I bought a SIM card with 100gig anytime on Black Friday special for 299. I also have a contract with them for iPhone which I pay around 560. My total should be around 890. Bt I’m always paying too much above 1100 or 1200. I called MTN I was told the SIM card was subscribed to content events the new sim which has never been to any phone I’m now to told its subscribed to content event called gamer . I was given a code to cancel all subscriptions of which I did. Come March the same thing happened I called to enquire again I was told the same story. I think MTN is conducting ***** using the MTN contract we are buying online. The SIM card for the 100gb data has never been in a phone I don’t have any active subscriptions since I was given that code to cancel subscriptions, but the money keeps increasing. I’m going to reverse the money for this month and cancel the contract because it’s been 3 months with no assistance. I advise people not to buy items online from you. I had an agreement for R 299 for 100gb only But I’m being charged for content event I know nothing about. And money is forever fluctuating if I complain it gets slightly lowered, if I don’t it increases dramatically. I’m never buying from MTN again